Hillary Clinton has inched closer to running for president, telling a marketing conference in San Francisco that she's "thinking" of seeking the office her husband held for two terms.

Speaking Tuesday at Marketo's 2014 Marketing Nation Summit, the former secretary of state, U.S. senator and first lady was asked by the software company's chief executive, Phil Fernandez, "What's your plan? Are you going to do it? You can announce it here if you'd like."

Clinton responded at first with quip, Reuters reported, saying she was actually there "to get some marketing advice."

"I am obviously flattered and deeply honored to have people ask me and people encourage me," Clinton added. "And I am thinking about it, but I am going to continue to think about it for a while."

The hard questions are not whether she wants to be president or thinks she can win, she said.

"The hard questions are why. 'Why would you want to do this and what can you offer that could make a difference?'" she said.

There and Oct. 25 at Colgate University, she made observations of the world political scene and foreign nations' perceptions of the United States' internal divisions. She didn't volunteer whether she was running for president; at Colgate, no one asked.

While she ,oved closer to a decision, a Suffolk University poll unveiled Wednesday showed Clinton was the choice of 63 percent of Democratic "self-described Iowa caucus voters," Politico reported. Massachusetts Sen. Elizabeth Warren was a distant second at 12 percent, followed by Vice President Joe Biden at 10 percent.

Clinton came in third in the Iowa caucus in 2008, the year she lost the Democratic nomination to Barack Obama.

Former Arkansas governor Mike Huckabee was the choice of 11 percent of Republican caucus-goers, followed by Sen. Rand Paul of Kentucky and former Florida governor Jeb Bush, each with 10 percent.

Clinton continues to attract financial support, too. At least a dozen independent Super PACs are raising money in her name, Reuters said in a separate report. Five others have been formed to raise money against a potential Clinton candidacy.

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